Practice cartridge



' I may 3 .9, 15925;

' KOLLER PRACTICE CARTRIDGE Filed 00f 31. 1923 Fg-Z ?atented May 19,1925.

PATENT JOSEF KOLLER, OF LUCERNE, SWITZERLAND.

PRACTICE CARTRIDGE.

Application filed October 31, 1923. Serial No. 672,616.

T 0 all whom it may concern:

Be it known that I, Josnr Konnnn, a citizen of the Republic ofSwitzerland, residing at Lucerne, in the Canton of Lucerne, Republic ofSwitzerland. have invented certain new and useful Improvements inPractice Cartridges of which the following is a specification.

This invention has for its object to provide an improved means forenabling miniature cartridges to be used in rifles and other small-arms,said means being of a very simple structure and affording the use ofminiature cartridges in rifles and other small arms in a very etlicientmanner. With these objects in view the invention consists in the noveldetails of construction and combination of parts more fully hereinafterdisclosed and particularly pointed out in the claim.

Referring to the accompanying drawing forming part of thisspecification, in which like numerals designate like parts Fig.- 1 is alongitudinal section of a means for using rim firing cartridges and Fig.2 is a partial similar section of a means for using centrally firingcartridges.

In Fig. 1 a is a bi-parted tubular bushing or lining designed to fit thechamber of a rifle or other small arm and upon which tightening rings2') of leather or other material are placed. The front portion of thebushing or lining has a reduced cylindrical projection 70 upon which theback portion 0 of the bushing or lining is axially movable and of whichthe portion 0 may be removed. The removable back portion 0 has a narrowbore to receive the miniature cartridge 6 and a Wide bore to receive aplug 9 having two projections h at its forward end for contact with therim of the cartridge 6 upon the actuation of the striker 2' of the firearm on the plug 9. The back portion 0 also has a groove at its rear endwhich is adapted to be engaged by the extractor (not shown). When thebreech bolt of the fire arm is drawn backwardly, the back portion 0 isremoved from the projection k of the front part of the bushing, so thatthe spent cartridge may be easily removed and a fresh cartridgeinsorted, whereupon the back part will be pushed forwardly upon theprojection 76 by the breech bolt. The front portion of the bushingoccupies this position as long as shooting with miniature cartridges isde sired.

In the modification shown by Fig. 2 the projection 7c of the frontportion of the bush ing is elongated and adapted to receive a centrallyfiring cartridge d hat I claim is:

h Ieans for enabling miniature cartridges to be used in rifles and othersmall-arms, comprising a bi-parted tubular bushing designed to fit thechamber of a small arm including a front portion having a reducedcylindrical projection, and a rear portion slidable on the projectionand removable therefrom, the rear portion. also having a bore to receivea cartridge and an annular 7O groove adapted to be engaged by theextractor of the rifle so that the back portion may be withdrawn fromthe front portion when the breech bolt of the rifle is retracted.

In testimony whereof I have aflixed my signature in presence of twowitnesses.

JOSEF KOLLER.

I/Vitnesses HERMANN HUBER, A. F. OALvonN.

